Some artists don't redirect on the profile

Occasionally, some artists do not correct properly on the profile charts and "Recently Listened Tracks", even though there's a redirect in place for that artist on the site.

Two examples:

http://www.last.fm/music/+noredirect/downtown+fiction
http://www.last.fm/music/+noredirect/Big+Pink

Both of these artists are fully redirected (to The Downtown Fiction and The Big Pink respectively), but for whatever reason, show up without the redirect on the profile if you scrobble Downtown Fiction or Big Pink.

This doesn't happen for almost every artist, but seems to happen for an odd few?

This one doesn't redirect but a page exists - http://www.last.fm/music/downtown+fiction/_/Super+Bass

If you scrobble artists like Beatles or Cribs, it automatically appears as The Beatles or The Cribs on the profile, but for some reason on the odd artist it doesn't redirect even though the redirect is in place.